Under rotary pumps are the gear, （）, c

1、The various pumps and lines are （） to

The various pumps and lines are （） to some extent so that each pump can act as an alternative for another.AinterlockedBinterconnectedCinterferedDinteracted

2、Two rams of the hydraulic gear are lin

Two rams of the hydraulic gear are linked at their outer ends to （） by a crosshead and swivel block.Athe piston rodBthe tiller armCthe connecting rodDthe rudder

3、Which of the following pumps are self

Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? （）(1) reciprocating(2) rotary(3) centrifugalA(1)onlyB(1)and (2)C(1),(2)and(3)D(2)and(3)

4、Under centrifugal pumps are the volute

Under centrifugal pumps are the volute, diffuser, mixed-flow, axial flow and （） or regenerative types.AreciprocatingBhydraulicCturbineDvane

5、Increasing the speed of a rotary pump

Increasing the speed of a rotary pump above its rated speed will result in which of the following conditions to occur?（）ALoss of suctionBIncreased clearancesCDecreased clearanceDDecreased slippage

6、Gear pumps are （） type because they di

Gear pumps are （） type because they discharge a near constant amount of liquid regardless of pressure.Apositive displacementBnon-positive displacementCmixed-flowDaxial-flow